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Loughmiller, Campbell and Lynn
Allionia incarnata L.
Trailing windmills, Trailing four o'clock, Pink windmills, Trailing allionia
USDA Symbol: ALIN
USDA Native Status: Native to U.S.
The orchid-colored trailing four-o’clock is a vine that grows along the ground; the plant may be 10 feet across. The stems, leaves, and buds are covered with soft white hair. The stems and flowers are sticky, and one rarely finds a flower without grains of sand stuck on the upper surface. Technically, what appears to be 1 flower is a cluster of 3 resembling a single radially symmetrical flower but no one but a trained botanist would ever guess it.
The flowers remain open most of the day, not just in the evening as suggested by the name. The other species, Smooth Trailing Four-oclock (A. choisyi), from Arizona to Texas and southward, has a perianth 3/16 (5 mm) long or less, and the curved edges of the fruit each bear 5-8 slender, gland-tipped teeth.
Plant CharacteristicsDuration: Perennial Habit: Herb Size Notes:
Ground cover Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Pink
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct
AZ , CA , CO , NM , NV , OK , TX , UT Native Distribution:
Southeastern California to southern Utah and Colorado; south to Texas, Mexico, and beyond. Native Habitat:
Dry gravelly or sandy soils in sun. USDA Native Status: L48(N)
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Sibley Nature Center
- Midland, TX
Herbarium Specimen(s)NPSOT 0616
Collected Oct 30, 1993 in Comal County by Mary Beth White
Recommended Species Lists
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Record Modified: 2010-10-20
Research By: TWC Staff